If you've never done the equivalent, it's only because you haven't been around computers very long.
Dude, in twenty years with computers I have never re-installed an OS to fix a problem (obviously this is distinct from installing a new version of the OS which could legitimately have a fix for it). For me rebooting the computer is even a last act of desperation that I am ashamed to take.
But then I am a unix/Linux user. I grant you the possibility that this may somehow have been a rational act for MacOS, though if true I find that disappointing.